Ok, thought I'd chime in here real quick. The answer to the initial question is yes and no. Hehe. You could put a big Air tank in the back of your X (or whatever) and pressurize your intake for a short time to similate having a Supercharger.
There are a few problems with this. Now, keep in mind, I'm not a Scientist by any stretch of the imagination, but myself and a friend attempted this exact thing to a 2001 Ranger Edge about 2 1/2 years ago.
First problem, pressurizing the intake. In order to Pressurize the intake, you need to setup the intake so that when you are pulling in compressed air (read, not pure o2), the regular intake is completely sealed and closed off. The reason for this? If you regulate 8 PSI into your intake just into the airbox or even directly into the air tube, you will blow just as much air out the intake as you do into the engine, if not more. During our testing of direct intake blowing without a close-off plate, we got a maximum of 2 PSI into the intake that was usable. We attempted to build a close-off plate using 2 Much Larger Throttle Bodies. The problem here was too much leakage from the air tank side. We concluded that we would have to rig up something on the tank or in the line from the tank itself to fully close-off the tank and prevent it from dumping all its contects before you want it to. But, there are ways around this, we were just messing around trying to see if we could make something and do it cheaper than an S/C.
The next problem you will have is air volume. Your average Air Tanks may be able to put out 125 PSI + through the hose, but the size of the hoses typically don't exceed 1/2". Since your intake is about 3", the effective pressure to your intake is going to be very low. When we were messing around, we had to use 4 individual tanks all pumping into one large line in the engine compartment.
Now, in our limited testing (we did all this over a weekend, just too see what would happen), the next problem we were running into was duration. We were using (4) 20 gallon tanks (what my friend had around the shop). All 4 were identical. With all (4) 20 gallon tanks pumped to max presure (whatever it was for those tanks, I can't remember anymore, its been too long) The pressure inside of them lasted for all of about 2 or 3 seconds before dying out. Of course, you could get more time out of it by using an even bigger tank, or possibly getting some super high pressured tank, but I have a strong feeling that you will be lucky to get about 8 seconds of usable boost before the tank would more or less be empty.
If I think back, I'm sure there were some other problems, but just read the above and think it over. I will not say at all that it is not possible to do this. As a matter of fact I think it is very possible and plausible to do it. My only warning is that you will probably spend a lot of time and a lot money on something that in the end will not be any cheaper or better than just getting NOs or a Supercharger.
Good luck to you though, I would love to be able to see someone make a good functioning system like this. My dad tried it about 20 years ago, and I tried it about 2. We both gave up because the power gained from it wasn't worth the time money and effort in our opinions, but that shouldn't ever discourage anyone from trying. Without people doing things that others said were impossible, we wouldn't be where we are today.
